An electromagnetic wave is propagating due east

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Waves Sound and Physical Optics · Waves Sound and Physical Optics

Problem

An electromagnetic wave is propagating due east. At an instant when its magnetic field is directed vertically upward, the direction of its electric field will be (a) towards geographic south (b) towards geographic north (c) towards east (d) vertically downward

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